During pregnancy, vaginitis can be treated with intravaginal medication. Intravaginal medication, which is a topical medication, does not cause systemic absorption and therefore has less effect on the fetus because the placenta itself acts as a barrier and does not affect the fetus greatly. During pregnancy, if you have trichomoniasis, you can use intravaginal metronidazole suppositories to treat it. If you have mycosis vaginalis, you can treat it with intravaginal mycoplasma suppositories. If you have mixed vaginitis, you can use nifurtimox suppositories. These topical medications do not have a great impact, but you need to stop using them in time after controlling the symptoms and not to overdose for a long time to avoid affecting the health of the fetus. If vaginitis is serious and not treated, it can easily lead to retrograde bacterial infection, which can affect the healthy development of the fetus in the uterine cavity and lead to infection of the uterine cavity, which can easily lead to intrauterine asphyxia of the fetus.